Slip-sheet mechanism for printing presses



July 30, 19129. E. R. LINEBAUGH SLIP SHEET MECHANISM FOR PRINTING PRESSES Filed June 1928 5 Sheets-Sheet 1 Juli 30, 1929; E. R. LlNEBAl JGl -l ,8

SLIP SHEET MECHANISM FOR PRINTING PRESSES Filed June 16, 1928 3 Sheets-Sheet 2 v u. N U 3 H m l. EE'GgF July 30, 1929. E. R. LINEBAUGH 1,722,397

SLIP SHEET MECHANISM FOR PRINTING PRESSES Filed June 16, 1928 5 Sheets-Sheet 3 Patented July 39, 1929.

warren srarss 1 igzzase'z W CE- 1 EDWARD nrnrnnnauen, OFBARBERTON, OHIO, assrsnon 'ro rr-rn DIAMOND Maren 1 COMPANY, or CHICAGO, rLLInoIs, a. connaonnrron OEILLINOIS.

SLIP-sneer MECHANISM Application filed June 16,

This invention relates to printingpresses, and more particularly to Gordon presses adapted to print relatively large sheets of pasteboard, or the like, which are subse-' quentlysubdivided into book-match covers having imprinted outer surfaces. Heavy inking, including gold and other metallic ink, is frequently used for the cover sheets,

and hence when the freshly printed sheets are delivered by the press to the stacker bed, the imprinted backs of the superimposed sheets are marked or smeared to a greater or less extent by their contact with the ink on the opposing printed surfaces. This marking or smearing is objectionable, especially when the reverse side of the sheet, which constitutes theinside of the match book covers, is. to 'besubsequently printed.

The object of my invention is to overcome the objection mentioned; and to that end I combine with a printing press simple and efiicient means whereby a supplemental sheet, termed a slip sheet, is placed upon the freshly printed surface of each pr nted sheet as rapidly as the latter is depositedon the stacker bed of the press; thus separating the opposing surfaces of the superimposed printed sheets. I

My invention also comprises novel features ,of construction and combinations of parts which will be hereinafter described, and the scope of the inventionthen be defined in the appended claims.

In the drawings-. p

Figure 1 is a side elevation of a portion of a Gordon press embodying my invention.

Fig. 2 is an elevation of aportion of the opposite side of the press, together with the associated slip-sheet transfer mechanism.

. nism.

Fig. 3 is a plan of the said transfer mecha- Fig. 4: is a view'illustrating the position of the slip-sheets during their release above and placement on the printed sheets on the stacker bed. I

Fig. 5 is an end elevation of a portioncf the press, showing the relation of the slipsheet tray to the stacker-bed, and illustrating the main elements of the slip-sheet mechanism. In this view the pneumatic transfer cup is shown supportinga slip sheet above the stacker bed.

, Fig. 6 is a similar view, but showing the transfer cup inraised position supporting a slip-sheet above the tray.

son PRINTING rnnssns.

1928 Serial No. 285,937.

the stationary main frame of a printing press of the Gordon type. 11 designates the swinging bed frame of the press, which frame supports the type form at 12, and also tlie'relatively inclined ink distributing disk 13, together with the inking devices and their appurtenances. This frame is actuated by a link and crank connection at each side of the press, one of the cranks being designated 14 and its associated link being designated 15. 16 designates oscillatory take-01f mechanism, including grippers l7 operative to grip the upper edge of each succeeding sheet as rapidly as'it is printed and transfer the sheet to a suitably-located stacker bed o-rtable 18 on the supporting frame. These grippers are carried by an oscillating arm 19 which is actuated from a driven shaft 20 of the 7 press through interposed cam and gear mechanism in the usual manner. According to my present inventionI arrange in cooperative relation to the printing press automatically operative 'mechanism whereby a slip sheet (A) is imposed on each succeeding printed sheet (B) when the lat ter is delivered to the stacker bed. The pre ferred form ofslip-sheet supplying'mechw' nism herein illustrated comprises a suitably elevated tray 21 which is supported between the stacker, bed, 18 and the printing mechanism of the press, and which tray is adapted to contain a stack of slip sheets A of paste board or other suitable material. This tray is supported by a bracket 22 extending from a post 23 rising from the main frame.'

24 designates a suction cup which is vertically movable into and above the tray 21, so as to pick up the uppermost slip-sheet from the stack, and which cup, when elevated, is movable in a horizontal path to position the attachedslip-sheet directly above the stacker bed. The mp2s is fast on a depending terminal branch 2530f ahorizontal- 1y extending pipe26 which is connected bymeans of ,a flexible tube 27 with the usual air line 28 extending from the compressed air reservoir 29 of the printingpress. The horizontal pipe 26 is reciprocative in a tubular guide 30 which is pivoted, as at, 31, to a vertical post 32 spaced from and secured to the post 23 by an angularfoot extension 33. This guide permits not only vertical oscillation of the pipe 26 and its depending branch 25 and cup 24 in respect to the tray, but also lug-'36 on the guide by mean'sof a link 7 37. The rock-arm is equipped at its free end with a roll'38 which co-op'erateswith a cam 39'on the shaft of one of the transverse delivery rolls of the'press; the roll 38 being held in operative contact with the periphery oi the cam by means ot'a spring 400- which is secured to the lug 36 and to a pin 11' projecting from the post 32.

- The cam comprises a disk having a'periph- ,cral recess A2 therein, which is so located as raises the sheet above-the tray, as se n i to permit and eiliect a downward and an upward movement of the roll 38 during the delivery of aprinted sheet from'the printing mechanism to the stacker table, thus producing a similar vertical movement of the airpipe'25 and its suctioncup 24. Thiscup in its vertical movement picks up the uppermost slip sheet contained in the tray and n Fig. 6. 7 V

Apreferred means for horizontally rec1p rocating the pipe26, together with the suction cup 24, includes a bell-crank Which is fulcr umed, as at 43, to the bracket 22. The shorter arm 44 of the bell-crank is connected eccentrically to the cam disk 39 by means of a link 45 and the longer arm 46 is connected by means of a link. 47 witha lug on the outer end of the pipe 26. The crank and link connections just described are so relatively disposed that during the rotation of the cam disk 39, the bell-crank is oscillated in a manner to effect the requisite longitudinal reciprocation oft-he pipe 26 and the suction cup. At thellimit of the outer stroke of: the pipe the suction cup, with the attached slip-sheet, is positioned directly over the stacker bed, as seen in Fig. 5. At this instant the connection in the air-line is temporarily interrupted, thus releasing the slip sheet from the suction cup and permitting the sheet to fall fiatwise upon the underlying printed sheet on thestacker bed. v

As a simple and efiicient' means to interrupt the air exhaust from the pipe 26at the proper intervals of time, the tube '27 is equipped with a normally Open check valve 48 which is supported by a bracket 49 on theirame 10. The spring-pressed stem 50 of the valve eXte'nds into the path of the adjacent crank 14; of the press, as such arm ap- 'proaches and completes its movement to the leftas viewed iniFig. 1, and hence the arm, impinging against the valve stem,temporarily, closes the valve. Any other suitable Where, as in the present instance, the

pasteboard slip-sheets are of large size, the

cup 24 is arr anged and'adapted to engage each succeeding slip-sheet at a spot somewhat away from the transverse median line of the latter, that is, toward one end of the sheet, as seen in Fig. 3. Consequently the opposite end of the sheet, when it is elevated from the tray, tends "to sag to a limited extent. To receive and support such end a horizontal rail 51 is mounted at a suitable level, which rail, in thepresent instance, has

at one end a downward bend 52 thatis seor the portion of the sheet held by the suction cup. The slip-sheet, thus slightly inclined, is carried and positioned over, the

stacker bed, and hence when the sheet is released tromthe suction cup, asj previously mentioned, the unsupported end of the sheet immediately drops and the other end is withdrawn from the supporting rail, whereupon rail and is thereby cammed above the plane theslip-sheet, in inclined position, falls and I comes to rest upon the underlying printed sheet on the stacker bed, as seen in Fig. 4. In this way the accurate positioning of the slip-sheet on the printed sheet' is accomplished.

In an application Serial No. 285,936 filed by me simultaneously herewith I disclose a form of mechanism for automatically supplying slip sheets'to' consecutively printed sheets, which application contains generic claims embracing'the speciesof the inven tion herein described and claimed. r

I claim 1. The combination with a printing press,

livering the printed sheets in succession on including a stacker bed and means for desaidbed, of means for supporting a stack of slip sheets adjacent the press, and transfer means operative inv timed relation to the press to remove the slip sheets in succession from the stack, move each succeeding slip sheet 1n a d1rect1on transverse to the movement of the printed sheets and deposit a slip sheet upon each succeeding printed sheet press to remove the slip sheets in succession from the stack and deposit a slip sheet upon f each succeeding printed sheet supported on the stacker bed, said transfer means including a pneumatic member movable vertically toward and from the stack and horizontally from the stack in a direction transverse to the movement of the printed sheets to a position above the bed, and means for automatically checking the holding operation 01": the pneumatic member when a slip sheet is located above the stacker bed.

3. The combination with a printing press, including a stacker bed and means for delivering the printed sheets in succession on said bed, of means for supporting a stack'ot slip sheets adjacent the press, and transfer means operative in timed relation to the press to remove the slip sheets in succession from the stack and deposit a slip sheet upon each succeeding printed sheet supported on the stacker bed, said transfer means including a pneumatic member movable vertically toward and from the stack and horizontally from the stack to a position above the bed, means for supporting a marginal portion 01" eachsheet clear of the stack of sheets during its horizontal travel, and means for antomatically checking the holding operation of thepneumaticmember when a slip sheet.

is located above the stacker bed.

4;. The combination with a printing press,

including a stacker bed and means for delivering the printed sheets in succession on said bed, of means for supporting a stack of slip sheets adjacent the press, and transfer means operative in timed relation to the press to remove'the slip sheets in successlon each succeeding printed sheet supported on the stacker bed, said transfer means including a horizontally movablepipe, a dependa slip sheet from above the stack of slip from the stack and deposit a slip sheet upon sheets to a point above the stacker, means 7 for exhausting air from said pipe, and

means for automatically interrupting the EDWARD R. LINEBAUGH. 

